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|
#!/bin/sh
#set -e
Read_only ()
{
for _PARAMETER in ${LIVE_BOOT_CMDLINE}
do
case "${_PARAMETER}" in
live-boot.read-only=*|read-only=*)
LIVE_READ_ONLY="true"
LIVE_READ_ONLY_DEVICES="${_PARAMETER#*read-only=}"
;;
live-boot.read-only|read-only)
LIVE_READ_ONLY="true"
;;
esac
done
case "${LIVE_READ_ONLY}" in
true)
;;
*)
return 0
;;
esac
# Marking some block devices as read-only to ensure that nothing
# gets written as linux still writes to 'only' read-only mounted filesystems.
LIVE_READ_ONLY_DEVICES="${LIVE_READ_ONLY_DEVICES:-/dev/* /dev/*/*}"
for _DEVICE in $(echo ${LIVE_READ_ONLY_DEVICES} | sed -e 's|,| |g')
do
# ignore symlinks like /dev/cdrom, /dev/block/* which point to actual devices
if [ -L "${_DEVICE}" ]
then
continue
fi
# only consider actual block devices
if [ ! -b "${_DEVICE}" ]
then
continue
fi
if ! blockdev --getsz "${_DEVICE}" >/dev/null 2>&1
then
printf " * live-boot: Ignoring '%-10s' (not present?)\n" "${_DEVICE}" > /dev/console
continue
fi
printf " * live-boot: Setting %-10s read-only..." "${_DEVICE}" > /dev/console
blockdev --setro "${_DEVICE}"
_RETURN="${?}"
case "${_RETURN}" in
0)
printf " done, use 'blockdev --setrw %-10s' to set read-write.\n" "${_DEVICE}" > /dev/console
;;
*)
printf " failed.\n" > /dev/console
;;
esac
done
if grep -qw persistence /proc/cmdline
then
printf " * Persistence mode enabled, searching for persistency related devices to unlock\n" >/dev/console
for label in custom-ov home-rw home-sn live-rw live-sn persistence
do
if blkid -t LABEL="$label" | grep -q '.'
then
device=$(blkid -t LABEL="$label" | awk -F: '{print $1}')
printf " - Setting device %-9s with label '%s' to write mode for persistence mode: " "$device" "$label" >/dev/console
blockdev --setrw $device && printf "done\n" >/dev/console || printf "failed\n" >/dev/console
fi
done
fi
}
|
